Bluetooth Low Energy
use UART Service to loopback anything received on the TX characteristic onto the RX.
Dependencies: BLE_API mbed nRF51822
Revision 6:e0fc9072e853, committed 2014-09-22
- Comitter:
- rgrover1
- Date:
- Mon Sep 22 10:42:54 2014 +0000
- Parent:
- 5:4bc41267a03a
- Child:
- 7:65911c3a3138
- Commit message:
- updating to 0.2.0 of the BLE_API
Changed in this revision
--- a/BLE_API.lib Tue Sep 02 16:32:58 2014 +0000 +++ b/BLE_API.lib Mon Sep 22 10:42:54 2014 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#ca826083980e +http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#620d28e7a1ba
--- a/main.cpp Tue Sep 02 16:32:58 2014 +0000
+++ b/main.cpp Mon Sep 22 10:42:54 2014 +0000
@@ -17,16 +17,13 @@
#include "mbed.h"
#include "BLEDevice.h"
-#define BLE_UUID_NUS_SERVICE 0x0001 /**< The UUID of the Nordic UART Service. */
-#define BLE_UUID_NUS_TX_CHARACTERISTIC 0x0002 /**< The UUID of the TX Characteristic. */
-#define BLE_UUID_NUS_RX_CHARACTERISTIC 0x0003 /**< The UUID of the RX Characteristic. */
+#include "UARTService.h"
-#define NEED_CONSOLE_OUTPUT 1 /* Set this if you need debug messages on the console;
+#define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
* it will have an impact on code-size and power consumption. */
#if NEED_CONSOLE_OUTPUT
-Serial pc(USBTX, USBRX);
-#define DEBUG(...) { pc.printf(__VA_ARGS__); }
+#define DEBUG(...) { printf(__VA_ARGS__); }
#else
#define DEBUG(...) /* nothing */
#endif /* #if NEED_CONSOLE_OUTPUT */
@@ -34,20 +31,7 @@
BLEDevice ble;
DigitalOut led1(LED1);
-// The Nordic UART Service
-static const uint8_t uart_base_uuid[] = {0x6e, 0x40, 0x00, 0x01, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
-static const uint8_t uart_tx_uuid[] = {0x6e, 0x40, 0x00, 0x02, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
-static const uint8_t uart_rx_uuid[] = {0x6e, 0x40, 0x00, 0x03, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
-static const uint8_t uart_base_uuid_rev[] = {0x9e, 0xca, 0xdc, 0x24, 0x0e, 0xe5, 0xa9, 0xe0, 0x93, 0xf3, 0xa3, 0xb5, 0x01, 0x00, 0x40, 0x6e};
-
-static const uint8_t SIZEOF_TX_RX_BUFFER = 128;
-uint8_t rxPayload[SIZEOF_TX_RX_BUFFER] = {0,};
-uint8_t txPayload[SIZEOF_TX_RX_BUFFER] = {0,};
-GattCharacteristic rxCharacteristic (uart_tx_uuid, rxPayload, 1, SIZEOF_TX_RX_BUFFER,
- GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);
-GattCharacteristic txCharacteristic (uart_rx_uuid, txPayload, 1, SIZEOF_TX_RX_BUFFER, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
-GattCharacteristic *uartChars[] = {&rxCharacteristic, &txCharacteristic};
-GattService uartService(uart_base_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *));
+UARTService *uartServicePtr;
void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
{
@@ -56,23 +40,18 @@
ble.startAdvertising();
}
-void onDataWritten(uint16_t charHandle, const GattCharacteristicWriteCBParams *params)
+void onDataWritten(const GattCharacteristicWriteCBParams *params)
{
- if (charHandle == rxCharacteristic.getValueAttribute().getHandle()) {
+ if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) {
uint16_t bytesRead = params->len;
DEBUG("received %u bytes\n\r", bytesRead);
- if (bytesRead < sizeof(rxPayload)) {
- memcpy(rxPayload, params->data, bytesRead);
- rxPayload[bytesRead] = 0;
- }
- DEBUG("ECHO: %s\n\r", (char *)rxPayload);
- ble.updateCharacteristicValue(txCharacteristic.getValueAttribute().getHandle(), rxPayload, bytesRead);
+ ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
}
}
void periodicCallback(void)
{
- led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
+ led1 = !led1;
}
int main(void)
@@ -90,14 +69,15 @@
ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
- (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1);
+ (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1);
ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
- (const uint8_t *)uart_base_uuid_rev, sizeof(uart_base_uuid));
+ (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
ble.startAdvertising();
- ble.addService(uartService);
+ UARTService uartService(ble);
+ uartServicePtr = &uartService;
while (true) {
ble.waitForEvent();
--- a/mbed-src.lib Tue Sep 02 16:32:58 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/mbed_official/code/mbed-src/#1f0269907d8b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Sep 22 10:42:54 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1 \ No newline at end of file
--- a/nRF51822.lib Tue Sep 02 16:32:58 2014 +0000 +++ b/nRF51822.lib Mon Sep 22 10:42:54 2014 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#e861f2041469 +http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#b3680699d9a4